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Crop Diseases

Rice Blast

The disease was first of all reported from China in 1637 and then in Japan in 1704. Presently, the disease is prevalent in almost all the rice growing countries of the world but is especially serious in humid areas. This has been considered as the most important disease affecting the …

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Gram Blight

Gram is an important and valuable crop particularly in the Barani tract of Pakistan. Blight is a serious disease of this crop in the North Western part of Punjab province. It frequently appears in an epidemic form and causes heavy losses. Total destruction of the crop has been reported in …

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Late Blight Of Potato

Potato is a native of Andes (South America), where this disease occurred in endemic form. The disease was recorded simultaneously in Europe and North America in 1830. It became very well established in Europe by 1842 and was one of the important causes of the great Irish famine in 1845 …

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Early Blight of Potato

Early blight (EB) is a disease of potato caused by the fungus Alternaria solani. It is found wherever potatoes are grown. The disease primarily affects leaves and stems, but under favorable weather conditions, and if left uncontrolled, can result in considerable defoliation and enhance the chance for tuber infection. Premature …

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Apple Scab

¬† The disease was first of all reported from Sweden by Fries in 1819. Now it has been reported from almost all parts of the world wherever apple or crab apple is grown. In Pakistan it has been reported from Murree and Hazara hills, Peshawar, Quetta and Kalat Divisions. It …

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Leaf Spot/Blight of Rice

It is a common disease in the rice growing countries of South Eastern Asia and also in Japan. It cause losses at three distinct phases. Firstly, poor germination of infected seeds. Secondly, leaf infection during seedling stage. Thirdly, shriveling and poor setting of seeds due to general weakening of the …

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Tikka Disease Of Groundnut

This is the most important fungal disease of groundnut. Losses due to this disease may go up to 15-50% and 70%, if associated with rust (Puccinia arachidicola). ¬†Symptoms :All the aerial parts of the plants are attacked. In case of attack by Cercosporidium personatum, the leaf spots are circular (1-6 …

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Root-Knot Nematode

Root-knot nematodes are plant-parasitic nematodes from the genus Meloidogyne. They exist in soil in areas with hot climates or short winters. About 2000 plants are susceptible to infection by root-knot nematodes and they cause approximately 5% of global crop loss (Sasser and Carter, 1985). Root-knot nematode larvae infect plant roots, …

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